1989 Yamaha Sleds:
Models Snowscoot EL SV80EN Snowscoot SV80N Viking VK540N Exciter EX570EN Exciter EX570N XL-V XL540N SR-V SR540N V-Max VMX540N Phaser EL PZ480EN Phaser S.E. PZ480FXN Phaser PZ480N Enticer Rev ET400TRN Enticer ET400TN Ovation EL CS340EN Ovation CS340N Inviter CF300N Bravo Trapper BR250TN Bravo Transporter BR250TSN Bravo BR250N
Engine (cyl) 79 79 535 (2) 569 (2) 569 (2) 535 (2) 535 (2) 535(2) 485(2) 485(2) 485(2) 408(2) 408(2) 337(2) 337(2) 292 (1) 246 (1) 246 (1) 246 (1)
Carb Type Mikuni B26-20 Mikuni B26-20 Mikuni B38-34 Mikuni VM38 Mikuni VM38 Mikuni B38-32 Keihn BD44-38 Mikuni  VM38x 2 Mikuni  BM38-32x 2 Mikuni  BM38-32x 2 Mikuni  BM38-32x 2 Mikuni B38-32x 2 Mikuni B38-32x 2 Teikei  Y30W-2x 2 Teikei  Y30W-2x 2 Keihn BD38-32 Keihn BD32-28 Keihn BD32-28 Keihn BD32-28
Main Jet 103.8 103.8 141.3 320 320 132.5 150 290 143.8 143.8 143.8 140 140 L-126,R-130 L-126,R-130 108 105 105 105
Clip Position               4                      
Pilot Jet 62.5 62.5 90 42.5 42.5 60 92 40 95 95 95 80 80 70 70 95 78 78 78
Float Height (mm) 15.6+/- 2 15.6+/- 2 12.7+/- 2 18.1+/-1 18.1+/-1 12+/- 2 15+/- 2 18.1+/-1 9.7+/- 1 9.7+/- 1 9.7+/- 1 12.7+/- 1 12.7+/- 1 31+/- 1 31+/- 1 15+/- 2 15+/- 2 15+/- 2 15+/- 2
Fuel Screws  7/8  7/8 1 1/4  5/8  5/8 1 1/2 2     1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 3/4 1 3/4 1 1/8 1 1/4 1 1/4 1 1/4
Pilot Air Jet     0.8     0.8 100   0.5 0.5 0.5 0.7 0.7 1.1 1.1 1 100 100 100
Idle RPM 2200 +/- 100 2200 +/- 100 1200 +/- 100 1500 +/- 100 1500 +/- 100 1200 +/- 100 1500 +/- 100 1500 +/- 100 1600 +/- 100 1600 +/- 100 1600 +/- 100 1700 +/- 100 1700 +/- 100 1800 +/- 100 1800 +/- 100 1100 +/- 100 1100 +/- 100 1100 +/- 100 1100 +/- 100
Drive                                      
Engagement RPM 4000 4000 2500 3700 3700 3400 3400 4000 3200 3200 3200 3200 3100 3500 3500 3000 3200 2900 3100
Shift RPM 6700 6700 6700 7250 7250 6900 7200 8200 6850 6850 6850 6500 6500 6600 6600 5750 5900 5700 5700
Belt Type                                      
Sheave Ctr to Ctr     268.5 mm 268.5mm 268.5mm 268.5mm 268.5 mm 305 268.5 mm 268.5 mm 268.5 mm 266 mm 266 mm 268.5 mm 268.5 mm 266 mm 266 mm 266 mm 266 mm
Sheave Offset     11 mm 11 mm 11 mm 11 mm 11 mm 11 mm  11 mm  11 mm  11 mm  11 mm 11 mm 11 mm  11 mm  15 mm 11 mm 11 mm 11 mm
Clutch Weights (rivets)                                      
Roller Type                                      
Primary Spring     White Gold-Green Gold-Green Wh-Purp Gold-Wh Wh-Yell Blue-Green Blue-Green Blue-Green White-Violet Blue Green Gold-Brown Gold Gold-Brown Gold-Pink None None
Secondary Spring     White White White Pink Pink Pink Yell-Blue Yell-Blue Yell-Blue Gold None Red Red None None None None
Secondary Setting      50 (2) A-2 (50) A-2 (50) A-2 (50) B-1 (30) C-2 (40) B-1 (60) B-1 (60) B-1 (60) 192 160 120 120 160 160 160 160
Helix Angle                                      
Gearing  27/44X 14/26 27/44X 14/26 17/39 17/31 17/31 17/29 17/31 18/33 17/29 17/29 17/29 14/31 12/23 12/22 12/22 12/19 10/24 12/23 13/22
Chain